An underground or shadow group who hold the true power of government because of "national security."

“The Secret Government is an interlocking network of official functionaries, spies, mercenaries, ex-generals, profiteers and superpatriots, who, for a variety of motives, operate outside the legitimate institutions of government. Presidents have turned to them when they can’t win the support of the Congress or the people, creating that unsupervised power so feared by the framers of our Constitution.” - Bill Moyers, Secret Government, PBS (Public Broadcasting Service) 1987